粘弹性层状介质的动力反分析

Inverse analysis of multilayered viscoelastic media from dynamic response

根据系统识别方法的基本原理 ,在频域对粘弹性层状介质的材料参数进行了位移反分析研究 .结果表明 ,初始值对于反算结果的影响很小 ,反算过程稳定收敛 ,系统识别方法对于层状介质粘弹性参数的动态识别是适用。

Based on the system identification fundamental principle, a method was developed to backcalculate the material properties of the multilayered halfspace viscoelastic media from its dynamic response. The forward analysis was done using an analytical method in the frequency domain. Numerical results show that the backcalculation is nearly independent on the seed parameters, the method is of high accuracy and validity to the dynamical viscoelastic parameter identification problems.